Cap-plate for cylindrical saw-blades and means for attachment of the saw-blade thereto.



G. N. WILLIAMS, JR. & J. WEGNER. GAP PLATE FOR GYLINDRIGAL SAW BLADESAND MEANS FOR ATTAOHMBNT OF THE SAW BLADE THERETO.

APPLICATION FILED 813F113, 1907.

922,650. 8. 11 r m gPatented May25,1909. 2

o o "I r 1' 0 mm! A U.

fnr 111602;)? 444412.

7H5 NORRIS PETERS co, wasmzvarary, v. c,

rinrran s'rairp s iggranr oririca GEORGE N. WILLIAMS, JR, AND JULIUSWEG'NER, OF NEW YORK, N. Y., ASSIGNORS TO SAID WILLIAMS.

CAP-PLATE FOR CYLINDRICAL SAW-BLADES AND MEANS FOR ATTACHMENT 0F THESAW-BLADE TI-IERETO.

Application filed September 13, 1907.

Specification of Letters Patent.

Patented May 25, 1909.

Serial No. 392,796.

T 0 all whom it may concern:

Be it known that we, GEORGE N. VJIL- LIAMS', Jr., a citizen of theUnited States, residing in the borough of Manhattan, city, county, andState of New York, and JULIUS W EGNER, a citizen of Russia, residing atAstoria, in the borough of Queens, county of Queens, in said city andState, have invented certain new and useful Improvements in Cap-Platesfor Cylindrical Saw-Blades and Means for Attachment of the SawladesThereto, of which the following is a speciiication.

In a prior application (series of 1900, No. 388,718 filed August 15,1907) we have described Improvements in cap-plates for cylindricalsaw-blades and in the attachment of the saw blade thereto wherein areshown saw blades adapted to out large cylindrical blocks of stone suchas are employed in the building up of columns in architectural work. Oursaid earlier application embraces a capplate adapted to the reception ofcylindrical saw blades of varying diameters.

The object of this invention is to provide a cap-plate for cylindricalsaw blades of the character described in said earlier application, and ameans for attachment of the saw blade thereto, wherein the joint betweenthe cap-plate and the saw blade is substantially sealed, whereby airpressure or hydraulic pressure may be employed within and the watersupplied in the cutting process with the debris resulting from thatprocess, may be driven out from the kerf to the outside of the cuttingblade and thus to the surface of the stone being operated upon. We haveascertained that in the operation of saw blades of the characterdescribed in our said previous application, there is danger of cloggingof the saw blade in the circular kcrf and consequent fracture of theblade, unless after the blade shall have cuta short distance into thestone, provision be made by employment of air or water pressure in'llusriing the kerf with water so that the debris of the cuttingoperation may be driven out with the water.

The cap-plate of this, our invention, is also adapted to the receptionof saw blades of varying diameters retained therein by a multiplicity ofholders and provided with means for maintaining substantial paral lelismbetween the cutting edge of the saw blade and the face of the cap-plate,means of readily centering the saw blade on the center of rotation ofthe cap-plate, as well means whereby one edge of the saw blade ismaintained in circular form.

Our invention consists also in the various combinations andconstructions hereinafter described and claimed.

In the accompanying drawings, which form part of this specification,Figure 1. is a cross section of the cap-plate and the portion of the sawblade through the line AB of Fig. 2. Fig. 2 is a plan view showing, withreference to llig. 1, the under surface of the cap-plate, and Fig. 3 isan enlarged sectional view showing one of the holders and parts of thesaw blade and cap-plate.

Referring now to these figures, 1 is a sawblade which is made by weldingor otherwise into the form of a hollow cylinder. At one edge thereof,called the cutting edge are shown teeth or cutters inserted therein inthe ordinary manner and hereafter referred to.

7 is the cap-plate or holder, one surface thereof being adapted forreception of the saw blade. ap-plate 7 is suitably attached. to rotatingshaft 10 as shown. ()n the plane or faced surface of cap-plate 7 are cutcircular grooves 8 8 8 as shown, for reception of one edge of the sawblade. Each of said circular grooves 8 8 8 is centered on the center ofrotation of cap-plate 7 for the purpose among other things of trulycentering the saw blade. Said grooves 8 8 8 are of such diai'nctersrespectively as to readily adapt them to the diameter of the saw bladewhich it is desired to use. We provide that said grooves 8 8 8 may besomewhat wider than the thickness of the edge of the saw blade which maybe drawn up in one of said grooves 8 8 8, as shown. Vi e also providethat a gasket 9 may be interposed between the edge of the saw blade andthe cap-plate 7, if desired.

In order to draw the edge of the saw blade snugly against the surface ofcap-plate 7 at a number of dii'ferent points about the circumference ofthe saw blade, the blade is perforated at 4- 4 4 for reception of therivets 3 3 3 employed to secure holders 5 5 5 near the edge of the sawblade. In Fig. 3 we have shown holder 5 secured a distance be low theedge of the saw blade to permit that edge to be drawn into circulargrooves 8 8 S, as above described. Holders 5 5 5 are made the solidcap-plate 7.

of metal .or other suitable material and L- l grooves 8 8 8 out in thesurface of the capshaped, as shown. They are perforated for reception ofscrew bolt 2. Screw bolts 2 are adapted to threaded holes 6 tapped intocapplate 7. For greater security against escape of the air or hydraulicpressure these screw holes 6 are shown passing only partly through Inthe drawings we have shown sixteen of these holders 5 arranged about thecircumference of the cylindrical saw-blade which, with their screw bolts2, are adapted to draw said edge up into the groove 8, at sixteendifferent points. Obviously more or less of these holders 5 may beemployed to firmly and tightly hold the edge of the saw blade againstthe cap-plate 1 in view of the diameter of the saw blade and theflexibility of the metal of which it is com posed. By means of holders5, secured as shown to the saw blade, and drawing its edge into thegrooves 8 8 8 of the solid capplate tightly against the gasket 9, itwill be obvious that a substantially sealed space is provided when thesaw blade is in operation (71. 6. closed at one edge of the saw blade bythe solid cap-plate and at the other edge by the stone being operatedupon) wherein either air or water pressure may be supplied to clear thekerf and free the saw blade in its work as described. For this purposerotating shaft 10 is made hollow at 11, as shown, for the introductionof water and air under pressure or of'water alone under pressure, asdesired. In the drawings we have shown four grooves 8 adapted to sawblades of various diameters. Obviously more or less of these grooves maybe provided for accommodation of a greater variety of sizes of sawblades.

Obviously other means than holders 5 with their attachments, the grooves8, and the gaskets 9 may be employed to perfect a substantiallyair-tight joint between the capplate and the edge of the saw blade, andwe do not confine ourselves to the specific means here shown, thepurpose being to provide a means for readily making a substantiallyairtight joint between the cap-plate and any one of the various sizes ofsaw blades which it is desired to use in combination therewith, and atthe same time to readily true and cen ter the saw blade and confine oneedge of it to substantially circular form by means of a multiplicity ofholders for the purpose above stated.

In construction of the above we prefer that the opposite edges of thesaw blade be faced so as to be substantially parallel with each other,as described in our said previous a plication, and also that the surfaceof tile cap-plate to which the saw blade is to be drawn be faced asnearly as may be to a true plane at right angles with the axis ofrotation of shaft 10 as is also in our said previous applicationdescribed; and we also prefer that plate, as shown, beof substantiallyuniform depth throughout their entire circumference in order thatsubstantial parallelism between the surface of the cap-plate and thecutting edge of the saw blade may be maintained.

In the saw-blade we employ rectangular teeth 14, which are inserted atthe edge of the blade in the ordinary manner. The diamonds are indicatedat 15. They are inserted in the teeth for the purpose of rapid cutting.Any other kind of teeth than diamond teeth, however, may be employedadapted to out under the action of the rapid rotary motion.

The rotating cylindrical saw blade with its cap-plate may be fed to thestone or the stone may be fed to the rotating saw blade also rotatingshaft 10 may be mounted in any proper machine frame and rotary motionimparted thereto in any suitable manner.

e claim:

1. The combination with a cylindrical saw blade of a rotating cap-platetherefor, means whereby said cap-plate may be rotated, a multiplicity ofholders disposed about the circumference of one edge of the saw bladeadapted to draw and hold said edge at a number of different pointsagainst the surface of the cap-plate and means whereby the joint betweenthe cap-plate and the saw blade is substantially sealed for employmentof air or hydraulic pressure within.

2. The combination with a cylindrical saw blade of a rotating cap-platetherefor, means 100 whereby said cap-plate may be rotated, a Vmultiplicity of holders disposed about the circumference of one edge ofthe saw blade adapted to draw and hold said edge at a number ofdifferent points against the surface of the cap-plate, means whereby thejoint between the caplate and the saw blade is substantially sea ed foremployment of air or hydraulic pressure, and means supported by thecap-plate whereby said last .1 named edge of the saw blade is maintainedin circular form. I

3. The combination with a cylindrical saw blade of a rotating cap-platetherefor, means whereby said cap-plate may be rotated, 5 a multiplicityof holders disposed about the circumference of one edge of the saw bladeadapted to draw and hold said edge at-a number of different pointsagainst the surface of the cap-plate, means whereby the 2 joint betweenthe cap-plate and the saw blade is substantially sealed for employmentof air or hydraulic pressure, means supported by the cap-plate wherebysaid last named edge of the saw blade is maintained in circu- 125 larform, and means supported by the capplate for readily centering the sawblade on the center of rotation of the cap-plate.

4. The combination with a cylindrical saw blade faced at both edges andhaving its cutsaw blade and the faced surface of the capplate, and meanswhereby the joint between the cap-plate and the saw blade is substantially sealed for employment of air or hydraulic pressure within.

5. The combination of a cap-plate for rotating cylindrical saw blades, amultiplicity of holders disposed about the circumference of one edge ofthe saw blade adapted toj draw and hold said edge at a number ofdifferent points against the surface of the capplate, means whereby thejoint between the cap-plate and the saw blade is substantially sealedfor employment of air or hydraulic pressure within, and means in saidcap-plate whereby saw blades of Varying diameters may be similarly oinedthereto.

6. T he combination of a cap-plate for rotating cylindrical saw blades,a multiplicity of holders disposed about the circumference of one edgeof the saw blade adapted to draw and hold. said edge at a number ofdifferent points against the surface of the capplate, means whereby thejoint between the capplate and the saw blade is substantially sealed foremployment of air or hydraulic pressure within, means in said cap-platewhereby saw blades of varying diameters may be similarly joined thereto,and means supported by the cap-plate whereby the saw blade is maintainedincircular form.

7. The combination of a cap-plate for rotating cylindrical saw blades, amultiplicity of holders disposed about the circumference of one edge ofthe saw blade adapted to draw and hold said edge at a number ofdifferent points against the surface of the capplate, means whereby thejoint between the cap-plate and the saw blade is substantially sealedfor employment of air or hydraulic pressure within, means in saidcap-plate whereby saw blades of varying diameters may be similarly oinedthereto, means sup ported by the cap-plate whereby the saw blade ismaintained in circular form, and means supported by the cap-plate forreadily centering the saw blade on the center of rotation of thecap-plate.

8. A cap-plate for cylindrical saw-blades provided with circular groovesadapted to saw-blades of different diameters, and means whereby asubstantially air tight joint bebetween the cap-plate and any one of thevarious sizes of saw-blades is substantially sealed for employment ofair or hydraulic pressure within, and means whereby said cap-plate maybe rotated.

GEORGE N. WILLIAMS, JR., JULIUS WEGNER.

Witnesses:

SAMUEL ADLER, ALrcE NroHoLs.

